Physics B Waves and Sound
Which expression should Trudy write?
(6mp + 8mn) - mc - 14
A sound wave has a frequency of 425 Hz. What is the period of this wave? 0.00235 seconds 0.807 seconds 425 seconds 850 seconds
0.00235 seconds
On a cold day, the speed of sound in air is 330 m/s. A note with a frequency of 1,320 Hz is played on an instrument. What is the wavelength of that sound wave? 0.25 m 4 m 1,650 m 435,600 m
0.25 m
A wave is produced in a rope. The wave has a speed of 33 m/s and a frequency of 22 Hz. What wavelength is produced? 0.67 m 0.75 m 1.5 m 3.0 m
1.5 m
What is the magnitude of the magnetic force acting on the charge?
1.6 × 10-1 N
A sound wave with a power of 8.8 × 10-4 W leaves a speaker and passes through section A, which has an area of 5.0 m2. What is the intensity of sound in this area? (Intensity = I = ) 1.8 × 10-4 W/m2 1.8 × 10-6 W/m2 1.6 × 10-4 W/m2 1.6 × 10-6 W/m2
1.8 × 10-4 W/m2
A sound wave with a power of 8.8 × 10-4 W leaves a speaker and passes through section A, which has an area of 5.0 m2. What is the intensity of sound in this area? (Intensity = I = power/area) 1.8 × 10-4 W/m2 1.8 × 10-6 W/m2 1.6 × 10-4 W/m2 1.6 × 10-6 W/m2
1.8 × 10-4 W/m2
A box that has a weight of 40 N is hung from a spring. The spring constant of the spring is 400 N/m. How many centimeters will the spring stretch? 0.1 cm 1 cm 10 cm 100 cm
10 cm
How much force is needed to stretch a spring 1.2 m if the spring constant is 8.5 N/m? 7.1 N 7.3 N 9.7 N 10.2 N
10.2 N
Seven-eighths of a sample of hydrogen-3 will have become a stable isotope after 36.9 years. What is the half-life of hydrogen-3?
12.3 years
A marching band is practicing. The band director sees the drum major hit a drum. How far away is the director if he hears the drumbeat in 0.40 seconds? The speed of sound is 330 m/s. 12 m 132 m 264 m 825 m
132 m
A transverse wave is shown. (Half of the total height which is shown as 4.2) What is the amplitude of this wave? 1.3 cm 2.1 cm 2.6 cm 4.2 cm
2.1 cm
A transverse wave is shown. What is the amplitude of this wave? 1.3 cm 2.1 cm 2.6 cm 4.2 cm
2.1 cm
What is the energy equivalent of an object with a mass of 2.5 kg?
2.25 × 1017 J
Sound travels slowest through what temperature of water? 20°C 40°C 60°C 80°C
20°C
A force of 75 N is applied to a spring, causing it to stretch 0.3 m. What is the spring constant of the spring? 0.004 N/m 22.5 N/m 75.3 N/m 250 N/m
250 N/m
A frequency generator sends a 550 Hz sound wave through both water and ice. What is the difference in wavelength between the wave produced in ice and the wave produced in water? 2.1 m 3.1 m 5.2 m 8.5 m 3.1 m
3.1 m
An FM radio station broadcasts at 9.23 × 107 Hz. Given that the radio waves travel at 3.00 × 108 m/s, what is the wavelength of these waves? 0.308 m 2.77 m 3.25 m 6.50 m
3.25 m
The speed of sound through argon is shown. If argon could exist as a solid, what would best represent the speed through solid argon? 10 m/s 250 m/s 500 m/s 3200 m/s
3200 m/s
A flute plays a note with a frequency of 266 Hz. What is the speed of sound if the wavelength is 1.3 m? 102 m/s 205 m/s 346 m/s 692 m/s
346 m/s
The two waves in the diagram are occupying the same place at the same time. At what time will the interfering waves have an amplitude of zero? 1.0 3.0 4.0
4.0
If the charge is moving at 1.3 × 106 m/s, what is the magnetic field strength?
8.5 × 102 T
If the magnetic force is 7.5 × 10-2 N, what is the magnitude of the charge?
8.8 × 10-5 C
A sound with an intensity greater than _____ dB can cause damage to human ears.
85
A sound with an intensity greater than ______ dB can cause damage to human ears.
85
The two waves in the diagram are occupying the same place at the same time. Which diagram shows the resulting interference?
A
What particle completes the equation? 239PU + 1n --> 100Zr 34 0 40
A
Which diagram best shows the perceived sound wave heard by a woman after a police car has passed her?
A (Circles small at siren and get larger and farther apart near woman)
Four friends, A, B, C, and D are standing varying distances away from a speaker which is producing sound waves. Which person will most likely hear the loudest sound? A B C D
A Closest to the speaker DUH
What best describes a possible transfer of energy? A mechanical wave transfers energy through matter. A longitudinal wave transfers energy perpendicular to wave motion. A transverse wave transfers energy parallel to wave motion. A sound wave does not need a medium to transfer energy through.
A mechanical wave transfers energy through matter.
Which is the best example of the wave phenomenon called transmission? A street is seen through a window. Sound is heard around an open doorway. A coin seems smaller at the bottom of a swimming pool. An image of a tree is seen is on the surface of a smooth lake.
A street is seen through a window.
Which is the best example of the wave phenomenon called transmission? A street is seen through a window. Sound is heard around an open doorway. A coin seems smaller at the bottom of a swimming pool. An image of a tree is seen is on the surface of a smooth lake.
A street is seen through a window.
What is the first step of the hydrogen fusion process?
A.
Which best illustrates the gravitational force in action?
A.
A wave is produced in a Slinky as shown. What is the direction of the Slinky wire at Point P as the waves travel through this point?
A. (the one pointing left and right)
The diagrams show the sound waves produced in one second from various tuning forks. Which sound wave has the lowest pitch?
A. Tuning fork with only one line of darker vertical lines
Study the diagram. Which correctly identifies the parts of a transverse wave? A: crest B: amplitude C: wavelength D: trough A: trough B: amplitude C: crest D: wavelength A: trough B: amplitude C: wavelength D: crest A: crest B: amplitude C: trough D: wavelength A: crest B: amplitude C: trough D: wavelength
A: crest B: amplitude C: wavelength D: trough
Color is a result of the absorption and reflection of light. A shirt appears a color because it reflects that color of light. A shirt appears black when it absorbs all wavelengths of light. Why does a shirt appear white outside on a sunny day? The light is transmitted through the shirt, so no color appears. The shirt absorbs the sunlight, so it appears white. All the light is reflected, so the shirt appears white. The sunlight refracts when it hits the shirt, so the shirt appears white.
All the light is reflected, so the shirt appears white.
Look at the diagram. Which point identifies a node? A B C D
B
Two wave pulses move toward each other along a rope. Which diagram shows the resulting wave when they cross at point X?
B
What is the third step of the hydrogen fusion process?
B.
Look at the wave diagram. Which wave would produce a standing wave when combined with the original one?
B. (the same amplitude, but opposite direction of wave motion)
Two wave pulses move toward each other along a rope. (two mountains about to run into each other) Which diagram shows the resulting wave when they cross at point X?
B. makes one mountain in the middle
The graph represents the simple harmonic motion of a pendulum. Which arrow indicates the period of the motion? A B C D
C
Which best illustrates the electromagnetic force in action?
C.
Consider this image of a wave. Which wave would cause destructive interference at every point of the wavelength and completely cancel out the wave?
D
What particle completes the equation? 1H + 15 --> ? + 4He 1 7 2
D
These graphs show measurements of the density of air as different sound waves pass a single point. Which sound wave will most likely be perceived as the loudest?
D highest amplitude
The image shows a pendulum in simple harmonic motion. The pendulum starts at A and swings to E. Which labels are correct? Check all that apply. E: Net force is zero. D: Velocity is decreasing. Acceleration is increasing. A: Velocity is zero. C: Acceleration is maximum. B: Velocity is decreasing. Net force is decreasing. E: Velocity is maximum.
D: Velocity is decreasing. Acceleration is increasing. A: Velocity is zero.
What is the name of the perceived change in a sound wave's frequency due to motion between the observer and the sound source? diffraction Doppler effect reflection resonance
Doppler effect
What are examples of devices that use electromagnetic waves? Check all that apply. FM radios microwaves TV remote controls alarm clocks X-rays
FM radios microwaves TV remote controls X-rays
Which statement describes why energy is released in a nuclear fission reaction based on mass-energy equivalence?
For large nuclei, the mass of the original nucleus is greater than the mass of the products.
Trevor places a mass on a spring. When he releases it, the mass and spring move in simple harmonic motion. How could Trevor increase the amplitude of the motion? He could use a longer spring. He could use a smaller mass. He could use a stiffer spring. He could pull the mass down farther.
He could pull the mass down farther.
Which statements describe the use of gamma rays to treat cancer? Check all that apply.
High-energy gamma rays are directed at a tumor from outside of the body. Gamma rays kill cancer cells in a tumor.
How is mass-energy equivalence demonstrated in the Sun?
Hydrogen nuclei fuse to form a larger nucleus, and a small amount of mass is converted into energy.
What hazard is associated with ionizing radiation?
It creates charged particles that can take part in chemical reactions in cells.
Which best describes the energy of a sound wave as it travels through a medium? It increases. It decreases. It remains the same. It depends on the medium.
It decreases.
Which statements describe the types of energy emitted by the Sun? Check all that apply.
It emits all wavelengths in the electromagnetic spectrum. It emits most of its energy as visible light. Its peak wavelength is in the yellow-green range.
What is the purpose of the metal core in an electromagnet?
It is magnetized by the field of the solenoid and increases the magnetic field strength.
How is the electromagnetic force different than both the gravitational force and the strong nuclear force?
It is repulsive.
Which statement best explains what was likely done to the nail?
It was struck repeatedly, which caused the domains to randomize and the nail to become nonmagnetic
Mateo adds two labels to the Venn diagram shown to explain how velocity and acceleration change during simple harmonic motion. Label 1: Zero at the equilibrium position Label 2: Increases with increasing net force Where should Mateo place the labels? Label 1: Z Label 2: Z Label 1: X Label 2: Z Label 1: Y Label 2: Y Label 1: Z Label 2: X
Label 1: Z Label 2: Z
In an experiment, a ringing bell is placed in a vacuum jar that does not have any air in it. What best describes why the bell is seen vibrating but not heard? Light waves have high frequencies and are able to pass through the vacuum jar, but the frequencies of sound waves are too low to vibrate a vacuum. Light waves travel faster than sound waves, so they are able to travel through the vacuum jar, but sound waves do not have enough energy to vibrate glass. Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present. Light is a longitudinal wave that is able to pass through the vacuum jar, but sound is a transverse wave that has to move perpendicular to air.
Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present.
In an experiment, a ringing bell is placed in a vacuum jar that does not have any air in it. What best describes why the bell is seen vibrating but not heard? Light waves have high frequencies and are able to pass through the vacuum jar, but the frequencies of sound waves are too low to vibrate a vacuum. Light waves travel faster than sound waves, so they are able to travel through the vacuum jar, but sound waves do not have enough energy to vibrate glass. Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present. Light is a longitudinal wave that is able to pass through the vacuum jar, but sound is a transverse wave that has to move perpendicular to air. Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present.
Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present.
A student is performing an experiment comparing sound and light waves. The student gathers the following data. What conclusion does the student most likely make based on this data? Light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. All sound waves always have the same energy, so the temperature of the medium does not affect wave speed. Light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. Tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.
Light waves always travel the same speed; however, the speed of sound is determined by the medium it travels through.
A student is performing an experiment comparing sound and light waves. The student gathers the following data. What conclusion does the student most likely make based on this data? Light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. All sound waves always have the same energy, so the temperature of the medium does not affect wave speed. Light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. Tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.
Light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through.
A ---------- is a point on a standing wave that appears to be stationary.
NODE
What error did Mimi make?
No change in mass number occurs in beta minus decay.
How does gamma decay differ from both alpha decay and beta decay?
No new element forms.
Which are advantages of using nuclear reactors to generate electricity? Check all that apply.
Nuclear power has a high output. Nuclear power is readily available. Nuclear power produces relatively low carbon dioxide emissions
Ten students stand in a circle and are told to make a transverse wave. What best describes the motion of the students? Each student bumps the shoulder of his or her neighbor. At the exact time, all students take a step to the right. The students skip clockwise, going in a circular motion. One at a time, each student lifts his or her hands up and then down.
One at a time, each student lifts his or her hands up and then down.
What occurs as energy is transferred through the convective zone of the Sun? Check all that apply.
Photons are absorbed by hot gas atoms. Energy is transferred through the large-scale movement of material. Energy is released into the photosphere.
The speed of sound in ice, water, and steam is shown. What best explains the speed of sound in different states of matter? Sound travels fastest in ice because energy is easier to transfer when the molecules are close together. Sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. Sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. Sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.
Sound travels fastest in ice because energy is easier to transfer when the molecules are close together.
Rana writes a summary about a mass on a spring in simple harmonic motion as it moves upward from the equilibrium position toward the maximum positive displacement. As the mass moves upward, the velocity is positive and decreasing while the acceleration is negative and decreasing. What error did Rana make? The velocity should be negative, not positive. The acceleration should be positive, not negative. The velocity should be increasing, not decreasing. The acceleration should be increasing, not decreasing.
The acceleration should be increasing, not decreasing.
Noah and Nina are 15 m apart in a closed room. Noah says the same sentence twice. The first time, Nina does not hear the sound, but she does hear the sentence the second time. What best describes the difference between the second sound wave and the first? The second sound wave reflects off the walls of the room, so Nina is able to hear the sound. The second sound wave travels faster to Nina, so less energy is dissipated through the air. The air molecules in the compressions of the second wave are more dense. The air molecules in the second wave are closer together on average, so they travel faster.
The air molecules in the compressions of the second wave are more dense.
A band director instructs students to play a pitch louder. How will the sound wave change when the band plays the same pitch louder? The speed of the sound wave will increase. The frequency of the sound wave will increase. The wavelength of the sound wave will increase. The amplitude of the sound wave will increase.
The amplitude of the sound wave will increase.
A wave has a wavelength of 4.9 m and a velocity of 9.2 m/s. The medium through which this wave is traveling is then heated to a greater temperature. What must be true about the frequency of this wave? The frequency is less than 1.9 Hz. The frequency is greater than 1.9 Hz. The frequency is equal to 1.9 Hz. There is not enough information to determine the frequency of this wave.
The frequency is greater than 1.9 Hz.
An opera singer breaks a crystal glass with her voice. Which best explains why this occurs? The pitch of her voice matches the pitch of the glass. The amplitude of her voice heats the glass until it breaks. The intensity of her voice produces a standing wave in the glass. The frequency of her voice matches the natural frequency of the glass.
The frequency of her voice matches the natural frequency of the glass.
What is the purpose of a rearview mirror in a car? The mirror allows the light to be absorbed so the driver will not see any glare. The mirror allows the light to interfere so the light waves combine to form an image. The mirror allows the light to be reflected so the objects behind the car can be seen. The mirror allows the light to be transmitted so the light will not reach the driver's eyes.
The mirror allows the light to be reflected so the objects behind the car can be seen.
The image shows one complete cycle of a mass on a spring in simple harmonic motion. A short, B medium, C long, D medium, E short Which describes the system at point D? The velocity has the maximum upward value because the acceleration upward is at a maximum. The net force is at a maximum in the downward direction, so the velocity begins to decrease. The velocity is zero because the net force is zero. The net force is zero, so the acceleration is zero.
The net force is zero, so the acceleration is zero.
he figure shows a sound wave as a function of time when the source is stationary with respect to the observer. Which shows the perceived sound wave heard by a stationary observer when the source moves toward the observer?
The one with the most lil bumps I think itd be classified as D...
Juan is standing on the street. An ambulance moves toward him and then passes by. What best describes the pitch that Juan hears? The pitch remains constant as the ambulance moves toward and then away from Juan. The pitch increases and decreases in a repeated pattern as the ambulance passes Juan. The pitch drops to a lower pitch once the ambulance passes by Juan. The pitch increases to a higher pitch once the ambulance passes by Juan.
The pitch drops to a lower pitch once the ambulance passes by Juan.
Which is true of a step-down transformer but not a step-up transformer?
The primary winding has more coils than the secondary winding.
Which describes why radioisotopes can be used as tracers in studying the biological and chemical processes of plants?
The radioisotope is chemically identical to the nonradioisotope the plant normally uses.
What best describes the speed of light waves in solids, liquids, and gases? The speed is fastest in solids. The speed is fastest in liquids. The speed is fastest in gases. The speed is the same in all matter.
The speed is the same in all matter.
A guitar string is plucked. What best describes the formation and transmission of the sound wave? The string vibrates the surrounding air, which produces a transverse wave. The string vibrates the surrounding air, which produces a longitudinal wave. The string produces a longitudinal wave that travels without a medium. The string produces a transverse wave that travels without a medium.
The string vibrates the surrounding air, which produces a longitudinal wave.
Which describes the error in her chart?
The strong nuclear force must be strong enough to overcome the repulsive force of protons, not electrons
The appearance of color is a result of the absorption and reflection of certain wavelengths of light. A shirt appears a certain color because it reflects that color of light. On the other hand, a shirt appears black when it absorbs all wavelengths of light and white when it reflects all wavelengths of light. How will sunlight most likely affect a black shirt on a hot summer day? The temperature of the shirt will depend on how much sunlight is diffracted around the shirt. The temperature of the shirt will not change because the sunlight is transmitted through the shirt to the body. The temperature of the shirt will decrease because most of the light is reflected off of the shirt. The temperature of the shirt will increase because all wavelengths of light are absorbed by the shirt.
The temperature of the shirt will increase because all wavelengths of light are absorbed by the shirt.
Rohit is trying to tune an instrument. He strikes a tuning fork and then plays a note that almost matches it. Rohit hears the volume of the two waves beating, which sounds like "wah-wah-wah-wah." What is the cause of the beats? The two waves produced have different speeds. The two waves produced have different amplitudes. The two waves produced have different wavelengths. The two waves produced have different frequencies.
The two waves produced have different frequencies.
As a mass on a spring moves farther from the equilibrium position, how do the velocity, acceleration, and force change? The velocity decreases, the acceleration decreases, and the net force decreases. The velocity increases, the acceleration decreases, and the net force decreases. The velocity increases, the acceleration increases, and the net force decreases. The velocity decreases, the acceleration increases, and the net force increases.
The velocity decreases, the acceleration increases, and the net force increases.
As a pendulum moves closer to the equilibrium position, how do the velocity, acceleration, and force change? The velocity decreases, the acceleration decreases, and the net force decreases. The velocity increases, the acceleration decreases, and the net force decreases. The velocity increases, the acceleration increases, and the net force decreases. The velocity decreases, the acceleration increases, and the net force increases.
The velocity increases, the acceleration decreases, and the net force decreases.
A sound wave travels through water. What best describes the direction of the water particles? The water particles move perpendicular to the source of the sound wave. The water particles move in the same direction as the vibrating source of the sound wave. The water particles move in random patterns because the sound is diffracted in many directions. The water particles do not move because the sound wave does not have enough energy.
The water particles move in the same direction as the vibrating source of the sound wave.
A sound wave travels through water. What best describes the direction of the water particles? The water particles move perpendicular to the source of the sound wave. The water particles move in the same direction as the vibrating source of the sound wave. The water particles move in random patterns because the sound is diffracted in many directions. The water particles do not move because the sound wave does not have enough energy.
The water particles move in the same direction as the vibrating source of the sound wave.
How are electromagnetic waves different than all other waves? They can be transmitted. They can be reflected. They can vibrate matter. They can travel through space.
They can travel through space.
How are electromagnetic waves different than all other waves? They can be transmitted. They can be reflected. They can vibrate matter. They can travel through space.
They can travel through space.
Which best describes fusion nuclear reactors?
They have been successful, but they are very expensive to operate.
How should he position the pipe cleaners? Check all that apply.
They should exit the box at N and enter at S. They should be put inside the box so the two ends join. They should form loops outside of the box over the top, bottom, and sides of the box.
Study the diagram. Point C identifies the _______________ of the wave.
Trough
Julian tests four springs and records the results in the table. Which lists the springs in order of increasing spring constant? W, Y, X, Z W, Y, Z, X Z, X, Y, W X, Z, Y, W
W, Y, X, Z
Look at the two wave diagrams. Which best describes the difference between wave A and wave B? Wave A has a greater pitch and frequency. Wave B has a greater pitch and frequency. Wave A has a greater pitch but lower frequency. Wave B has a lower pitch but greater frequency.
Wave A has a greater pitch and frequency.
All parts of the electromagnetic spectrum travel at a speed of 3 × 108 m/s when traveling through no medium. A "vacuum" means that there is no medium, such as a tube without any air in it. Therefore, 3 × 108 m/s is said to be the speed of light in a vacuum. If an electromagnetic wave's frequency doubles in a vacuum, what are the other effects on the wave? Wavelength doubles and speed doubles. Wavelength doubles and speed stays the same. Wavelength divides in half and speed doubles. Wavelength divides in half and speed stays the same.
Wavelength divides in half and speed stays the same.
Which statements best describe X-rays? Check all that apply. X-rays are electromagnetic waves. X-rays are longitudinal waves. X-rays are mechanical waves. X-rays are transverse waves. X-rays travel at the speed of light. X-rays travel at the speed of sound.
X-rays are electromagnetic waves. X-rays are transverse waves. X-rays travel at the speed of light.
Which statements best describe X-rays? Check all that apply. X-rays are electromagnetic waves. X-rays are longitudinal waves. X-rays are mechanical waves. X-rays are transverse waves. X-rays travel at the speed of light. X-rays travel at the speed of sound.
X-rays are electromagnetic waves. X-rays are transverse waves. X-rays travel at the speed of light.
Which labels belong in the regions marked X, Y, and Z?
X: A larger nucleus forms Y: Large amounts of energy are released Z: Smaller nuclei form
Which labels belong in the areas marked X, Y, and Z?
X: Attractive and repulsive Y: Very Small range Z: Always attractive
Trina makes a diagram to summarize how to use the right-hand rule to determine the direction of the magnetic force on each type of charge.
X: Back of hand, for force Y: Thumb, for velocity Z: Palm of hand, for force
Which labels belong in the regions marked X and Y?
X: Converts mass into energy Y: Is controlled by neutron absorption
Lidia makes a graphic organizer to compare temporary magnets with permanent magnets.
X: Maintains magnetic properties in the presence of another magnet Y: Is made from magnetically hard ferromagnetic material
Which characteristics of a radioisotope make it useful for diagnosing medical problems?
a short half-life and it is taken up by a specific part of the body
Which sound will most likely have the highest pitch? a bass drum (150 Hz) a distant thunder (90 Hz) a tuba (60 Hz) a whistle (1000 Hz)
a whistle (1000 Hz)
If the energy of the wave becomes part of the internal energy of the object, then the wave's energy is ______
absorbed
If the energy of the wave becomes part of the internal energy of the object, then the wave's energy is ___________.
absorbed
The height of a transverse wave from the midpoint to the crest or trough is the ______________.
amplitude
Two waves are shown. Each wave has the same frequency and velocity. However, Wave B carries more energy. What part of the wave determines how much energy it has? amplitude period velocity wavelength
amplitude
Which device converts kinetic energy into electrical energy?
an electric generator
Which characteristic is shared by all four fundamental forces?
attraction
The amount of energy required to break a nucleus into individual protons and neutrons is called
binding energy
When two waves are in sync with each other and occupy the same place at the same time, how is the resulting wave determined? by averaging the wavelengths of the two waves by dividing the frequencies of the two waves by multiplying the velocities of the two waves by adding the amplitude of the two waves
by adding the amplitude of the two waves
When two waves are in sync with each other and occupy the same place at the same time, how is the resulting wave determined? by averaging the wavelengths of the two waves by dividing the frequencies of the two waves by multiplying the velocities of the two waves by adding the amplitude of the two waves
by adding the amplitude of the two waves
Consider the intensities of the sounds listed below. Which lists the amplitudes of sound waves from these sources in order from greatest to least? busy roadway, kids whispering, average home chainsaw, diesel truck, rustling leaves kids whispering, vacuum cleaner, jet airplane library, conversational speech, music from speaker
chainsaw, diesel truck, rustling leaves
Which is the most likely solution to the problem?
checking the commutator, because the current is not reversing
What change would most improve his results?
connecting the galvanometer to the coil
Which voice can produce a pitch that has a speed of 343 m/s and a wavelength of 0.68 m? Check all that apply. bass baritone tenor contralto soprano
contralto soprano
The diagram shows a wave traveling through a medium. Identify point B. amplitude crest trough wavelength
crest
The diagram shows a wave traveling through a medium. Identify point B. amplitude crest trough wavelength
crest
What is the SI unit for intensity? decibel mel joule watt
decibel
If a soundproof door is almost shut but still leaves a small opening, what wave phenomenon is responsible for someone being able to hear sound from the room while standing by the wall to the side of the opening? absorption diffraction reflection refraction
diffraction
If a soundproof door is almost shut but still leaves a small opening, what wave phenomenon is responsible for someone being able to hear sound from the room while standing by the wall to the side of the opening? absorption diffraction reflection refraction
diffraction
Study the image below. What interaction causes the water to spread as they pass through the rock opening? absorption diffraction reflection refraction
diffraction
The image shows water passing through a barrier. What type of wave activity is shown in the image? absorption diffraction reflection refraction
diffraction
The image shows water passing through a barrier. (its like a dam or something) What type of wave activity is shown in the image? absorption diffraction reflection refraction
diffraction
What interaction causes the water to spread as they pass through the rock opening? absorption diffraction reflection refraction
diffraction
Sunlight is shown filtering through clouds. What wave phenomenon is responsible for the sunlight shown in this diagram? diffraction, because light is bent around the clouds refraction, because the light bends through the clouds absorption, because the sunlight is absorbed by the clouds transmission, because the sunlight travels through the clouds
diffraction, because light is bent around the clouds
Sunlight is shown filtering through clouds. What wave phenomenon is responsible for the sunlight shown in this diagram? diffraction, because light is bent around the clouds refraction, because the light bends through the clouds absorption, because the sunlight is absorbed by the clouds transmission, because the sunlight travels through the clouds
diffraction, because light is bent around the clouds
An object that is in simple harmonic motion is restored to its equilibrium position due to a force that is proportional to which quantity? tension velocity displacement period
displacement
Which are examples of transverse waves? Check all that apply. earthquake P-waves earthquake S-waves radio waves sound visible light X-rays
earthquake S-waves radio waves visible light X-rays
Light is produced by which fundamental force?
electromagnetic
The ________ force is responsible for the way that electrical charges and magnets interact with each other.
electromagnetic
Water molecules are made of slightly positively charged hydrogen atoms and slightly negatively charged oxygen atoms. Which force keeps water molecules stuck to one another?
electromagnetic
The generation of an electric current in a closed circuit by a changing magnetic field is
electromagnetic induction
What is transmitted by all waves? energy mass matter sound
energy
What is transmitted by all waves? energy matter sound mass
energy
How many wavelengths are seen in this image of a sound wave? three four six ten
four (An ear and a bell literally four lines of "particles" are darker)
The emission of light from a radioisotope occurs during _______ decay
gamma
Energy released by fusion in the Sun is initially in the form of
gamma rays
A student hears a police siren. What would change the frequency that the student hears? Check all that apply. if the student walked toward the police car if the student walked away from the police car if the police car moved toward the student if the police car moved away from the student if the intensity of the siren increased if the intensity of the siren decreased
if the police car moved toward the student if the police car moved away from the student
Where does the peak wavelength emitted by the Sun fall in the electromagnetic spectrum?
in the yellow-green range
Which change can make a generator stronger?
increasing the number of coils in the armature
In 1940, the Tacoma Narrows Bridge across the Puget Sound collapsed. The bridge was a suspension bridge. The wind blowing through the narrows matched the natural frequency of the bridge. This resulted in a large movement of roadway, which eventually caused the bridge to fail. What characteristic of waves caused the bridge to collapse? absorption, because the bridge absorbed all the energy of the wind diffraction, because the wind moved around the bridge, which set the bridge into motion interference, because constructive interference occurred when the wind frequency matched the natural frequency of the bridge interference, because destructive interference occurred when the wind frequency matched the natural frequency of the bridge
interference, because constructive interference occurred when the wind frequency matched the natural frequency of the bridge
In 1940, the Tacoma Narrows Bridge across the Puget Sound collapsed. The bridge was a suspension bridge. The wind blowing through the narrows matched the natural frequency of the bridge. This resulted in a large movement of roadway, which eventually caused the bridge to fail. What characteristic of waves caused the bridge to collapse? absorption, because the bridge absorbed all the energy of the wind diffraction, because the wind moved around the bridge, which set the bridge into motion interference, because constructive interference occurred when the wind frequency matched the natural frequency of the bridge interference, because destructive interference occurred when the wind frequency matched the natural frequency of the bridge
interference, because constructive interference occurred when the wind frequency matched the natural frequency of the bridge CHECK THIS ONE
What best describes the relationship between wavelength and frequency in an electromagnetic wave? always equal no relationship directly proportional inversely proportional
inversely proportional
Which describes the weak nuclear force only? Check all that apply.
is repulsive is weaker than the electromagnetic force
Compared to the weak nuclear force, the electromagnetic force
is stronger
Which best describes the energy of a sound wave as it travels through a medium? It increases. It decreases. It remains the same. It depends on the medium.
it decreases
As the distance of a sound wave from its source quadruples, how is the intensity changed? it increases by a factor of 4 it increases by a factor of 16 it decreases by a factor of 4 it decreases by a factor of 16
it decreases by a factor of 16
If the amplitude of a wave increases by a factor of 4, how is the intensity changed?
it increases by a factor of 16
What best describes the refraction of light rays? light bouncing off of a mirror light bending when it passes through a lens light getting brighter when two waves combine light passing through a clear glass window
light bending when it passes through a lens
What best describes the refraction of light rays? light bouncing off of a mirror light bending when it passes through a lens light getting brighter when two waves combine light passing through a clear glass window
light bending when it passes through a lens
SONAR stands for "sound navigation and ranging," and it is used to map and explore the ocean floor. What best describes a SONAR wave? transverse and electromagnetic transverse and mechanical longitudinal and electromagnetic longitudinal and mechanical
longitudinal and mechanical
SONAR stands for "sound navigation and ranging," and it is used to map and explore the ocean floor. What best describes a SONAR wave? transverse and electromagnetic transverse and mechanical longitudinal and electromagnetic longitudinal and mechanical
longitudinal and mechanical
What best describes a sound wave? transverse and electromagnetic longitudinal and mechanical longitudinal and electromagnetic transverse and mechanical
longitudinal and mechanical
What best describes a sound wave? transverse and electromagnetic longitudinal and mechanical longitudinal and electromagnetic transverse and mechanical
longitudinal and mechanical
A tuning fork is vibrating the air around it. What best describes the waves produced by the tuning fork? mechanical, because the air molecules are moving perpendicular to the tuning fork mechanical, because the vibrating tuning fork makes air molecules around it vibrate electromagnetic, because the air molecules are moving parallel to the tuning fork electromagnetic, because the vibrating tuning fork does not need air in order to produce sound
mechanical, because the vibrating tuning fork makes air molecules around it vibrate
An ambulance emits a frequency of 450 Hz from its siren. What frequency is heard by a man as the ambulance moves toward him? less than 450 Hz more than 450 Hz 450 Hz 0 Hz
more than 450 Hz
Which are associated with nuclear fission but are not associated with nuclear fusion? Check all that apply.
neutrons striking nuclei two small nuclei forming a single large nucleus breaking apart
a __________ is a point on a standing wave that appears to be stationary.
node
Which nuclear process does the equation illustrate?
nuclear fusion, because the equation shows two hydrogen nuclei combining to form a helium nucleus
A longitudinal wave moves energy that is ___________ to the direction of the wave's movement.
parallel
The ______ is the time it takes for a wave to complete one cycle.
period
A source emits a sound and is represented by the red dot in this map. Four people are located around the source, and the circles represent the sound wave. As the source moves west, which person hears the highest pitch? person A person B person C person D
person A
The subjective perception of frequency is ________.
pitch
________ is the perceived frequency of a sound wave.
pitch
Electromagnetic energy released during fusion is converted to other kinds of photons as it is transferred through which layer of the Sun?
radiative zone
A sound wave travels through air. In which regions are air molecules the least dense? compressions frequencies pitches rarefactions
rarefactions
When a DVD is played, a laser light hits the surface of the disk and then returns to the detector. Which wave phenomenon allows the DVD player to work? absorption interference reflection refraction
reflection
When a DVD is played, a laser light hits the surface of the disk and then returns to the detector. Which wave phenomenon allows the DVD player to work? absorption interference reflection refraction
reflection
Which force is always attractive and has a very small range?
strong nuclear
What property is primarily responsible for determining the type of electromagnetic energy and peak wavelength emitted by a star such as the Sun?
temperature
Which best describes pitch?
the number of cycles per second perceived by the human ear
Which best describes pitch? the amount of time taken for a longitudinal wave to produce one cycle the number of cycles per second perceived by the human ear the amplitude of a wave when the natural frequency is matched the distance between two corresponding parts of a transverse wave
the number of cycles per second perceived by the human ear
Which best describes loudness? the subjective measurement of the intensity of sound the subjective measurement of the wavelength of a sound wave an inherent measurement of the intensity of sound an inherent measurement of the wavelength of a sound wave
the subjective measurement of the intensity of sound
What factors affect the speed of a wave? Check all that apply. the amplitude of the wave the energy of the wave the temperature of the medium the type of wave the type of medium
the temperature of the medium the type of wave the type of medium
What two factors affect the speed of a sound wave as it travels through a medium? the energy transferred by the wave and the density of the medium the type of medium and the energy transferred by the wave the type of medium and the temperature of the medium the temperature of the medium and the energy transferred by the wave
the type of medium and the temperature of the medium
What two factors affect the speed of a sound wave as it travels through a medium? the energy transferred by the wave and the density of the medium the type of medium and the energy transferred by the wave the type of medium and the temperature of the medium the temperature of the medium and the energy transferred by the wave
the type of medium and the temperature of the medium
What type of wave is a microwave? heat longitudinal sound transverse
transverse
A police officer uses a radar gun to determine the speed of a car. A specialized radar gun uses ultraviolet light to determine the speed. What describes the wave used? Check all that apply. transverse longitudinal heat electromagnetic sound
transverse electromagnetic
A pebble is dropped in a pond. Which best describes the type of wave seen here? transverse, because the water molecules move up and down, which is parallel to the motion of the wave transverse, because the water molecules move up and down, which is perpendicular to the motion of the wave longitudinal, because the water molecules move up and down, which is parallel to the motion of the wave longitudinal, because the water molecules move up and down, which is perpendicular to the motion of the wave
transverse, because the water molecules move up and down, which is perpendicular to the motion of the wave
Study the diagram. Point C identifies the ___________ of the wave.
trough
In which range is the peak wavelength of a star that is much hotter than the Sun most likely to be?
ultraviolet light
Which are methods of reducing exposure to ionizing radiation? Check all that apply.
using a lead apron during medical X-rays using a short burst of X-rays to take an image taking an image of the smallest possible area
Which equations represent the relationship between wavelength and frequency for a sound wave? Check all that apply. v = (lambda) f (lambda)= vf f = (lambda)v (lambda) = v/f (lambda) = f/v f = v/(lambda) f = (lambda)/v
v = (lambda) f (lambda) = v/f f = v/(lambda) (1,4,6)
The diagram represents wavelengths of different colors of visible light that pass by in a specific time period. Which color of light has the greatest frequency? red yellow blue violet
violet
Sound will travel slowest through which medium? water at 55°C water at 75°C ice at 0°C ice at -25°C
water at 55°C
Carbon-14 is a radioactive element that undergoes beta decay. Which force is responsible for allowing carbon-14 to become stable?
weak nuclear
Which two terms best describe the gravitational force?
weakest, attractive
What change would enable Gazala to pick up eight paper clips?
wrapping the wire around the nail more times